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G. G. WIMPEE.

LIFTING JACK.

Patented Mar. 10, 1885.

llivrrai) STATES GEORGE C. \VIMPEE, OF ROME, GEORGIA.

LIFTING JACK.

SPECIFICATION forming part of Letters Patent No. 313,794, dated March 10, 1885.

Application filed January 24, 1885. (No model.)

To all whom it may concern:

Be it known that I, GEORGE O. WIMPEE, a citizen of the United States, residing at Rome, in the county of Floyd and State of Georgia, have invented a new and useful Improvement in Lifting-Jacks, of which the following is a specification.

My invention relates to lifting devices of the class known as "wagon-jacks, and has for its object the production of a wagon-jack of simple construction and of a limited number of members, so combined and arranged that friction of the movable parts is reduced to a minimum, all as hereinafter described, and specifically pointed out in the claims.

Referring to the accompanying drawings, in which like letters of reference point out similar parts of each figure, Figurel is a side view of my improved wagonjack, and Fig. 2 is a View of the obverse side thereof.

In the drawings, A is the standard 5 a, the sill or foot-piece; B, a movable post provided wit-h steps b, common to devices of this character; 0, a lever having an eccentric cam end, 0,- D, a pulley or friction-roller d d (1 pivoted disk-guides; E, a stirrup. The lever G is pivoted to the standard A, the pivotpin passing through said standard, its opposite end being provided with a revolving disk, cl, on the reverse side of the standard. Said standard is pierced at its lower part to receive a pin, onto which,at either end,is nutted a guide-disk, d d. The peripheries of these disks extend beyond the front edge of said standard, and partly embrace the movable post B, acting as a guide or channel through which said post can pass upward and downward without risk of lateral displacement. The standard A is supported upon a sill, a, composed of two parallel. strips which embrace the foot of thestandard A, said sillstrips and standard being firmly connected by means of bolts c of, leaving an intermediate opening, which will receive the lower end of the leg B, as plainly shown in the drawings. The movable post B has steps b, and at the lower end of the stepped upper part it is cut away, forming an open slit, 1), which when the jack is at rest falls over the upper part of the stirrup E, and prevents said post from falling downward beyond a predetermined distance. Said stirrup E is firmly attached to the standard, its front portion forming an open bow through which the leg of the post B can freely move.

Pivoted to the back part of the post B is a fulcrum-pulley, D, which acts also as a fric tion-roller. It is so attached that it partly overlaps the front portion of the standard A, and in like manner upon the opposite end of its pivot, upon the opposite side of the post B, is a rotatable disk, d. The operative lever C has its cam-head so formed that the pulley D will rest upon and take into its upper inverted curve. The back edge of the lever, when elevated, is aboutin alignment with the rear edge of the standard A, while the cam extends forwardly over the side of the post A, as plainly shown in Fig. 1.

The operation of my device will be readily understood from the drawings. At rest it will be in the position shown in solid lines, the post B being interlocked over the stirrup E. When the lever O is depressed, (see dotted lines,) the cam will take against the fulcrum-pulley D, which will turn as it is pressed against, and the effect will be to elevate the post B. At the same time said pulley will turn 011 its pivot, as will also the disk d on its pivot, and the post B will be raised without any frictional resistance. It cannot be laterally displaced, its leg being embraced within the stirrup E, also between the friction-roller and the several disks, as before described.

Having now fully described my invention, what I claim is- 1. A wagon-jack having a standard, A, at tached to a sill, a, provided with guide-disks d (2*, and a pivoted cam-headed lever, O, in combination with astepped post, B, provided with a pivoted pulley, D, arranged as described, as and for the purpose intended, sub stantially as described.

2. In a wagon-jaclgthe pivoted cam-headed lever O, in combination with a pivot-ed fulcram-pulley, D, arranged at one side of the movable post B,said pulley partly overlapping one side of the standard A, substantially as described.

3. In awagon-jaclr,the movable post B, having its leg embraced within a stirrup, E, attached to a standard, in combination with guide-disks d diattached to said standard and a movable post B, stepped at its upper part, 10 overlapping the sides of said post,and pivoted and provided with pivoted fulcrum-pulley D pulley D, and rotatable disk d,attaohed to said and guide-disk d, as and for the purpose inpost and overlapping said standard, substantended, substantially as described.

5 tially as described. i 1 4. AWagon-jack consisting of the following GEORGE WIMPEE' combined elements: asill, a, attached to stand- Witnesses: ard A, having pivoted thereto a cam-ended SEABORN WRIGHT,

lever, G, and guide-disks d d", and stirrup E, O. F. KOHLHEIM. 

